Before I start: Yes, this element is mostly pointless, like CLST, SAWD, GLOW, etc. are.

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Element name: Foam [FOAM]

Element type: Liquid

Color: White or off-white. Affected by fancy display. (maybe glows under fire display)

Spawns at 22C. Can be created with mouse, or:

• When a pixel of SOAP experiences a sudden change in either vx or vy, and there is a pixel of WATR nearby, the SOAP will turn into a pixel of FOAM.
• When a pixel of SLTW or WATR experiences a sudden change in either vx or vy, it has a chance to spawn a FOAM in an adjacent empty pixel. SLTW has a much higher chance than WATR to do this.(Maybe have the velocity change requirement less if it is next to a pixel of SAND?)

When a pixel of FOAM is created, it is assigned a life value randomly (Gaussian distribution around 100 for WATR, 500 for SLTW). Life constantly decreases, and the pixel despawns at life=0.

Shares the same density as SAWD.

Special properties:

Falls like DUST or SAWD. (gravity = 0.1, or 0.13 for less floating)

Destroyed when next to SPNG or GEL, or at 100C or 0C.

Clumps together like CLST, or like the failed moving solid tests, whichever seems more like foam.

Does not generate pressure or air velocity when moving

(maybe grows/shrinks under pressure, similarly to how DEST grows/shrinks under heat.)

(maybe destroyed when pushed into anything with PSTN?)

Basically, it adds to the aesthetics of the game, and allows for better waterfalls and waves.

@NUCLEAR_FOX (View Post)

 Soap sinks in water and has the same density as SLTW, so it doesn't work.

Removed the SOAP thing and added some minor details